Combined pressure-reducing and gas-flow-regulating valve



Dec. 6, 1927. 1,651,507

H. F. BLOMQUIST ET AL COMBINED PRESSURE REDUCING liND GAS FLOW REGULATING VALVE Filed June 28, 1927 2 Sheets-Sheet l I g8 44 iz 73km was; 3 4% 42 37 BY 6Z6? 9 ATTORNEY.-

Dec. 6, I927. 1,651,507 H. F. BLOMQUIST ET AL COMBINED PRESSURE REDUCING AND GAS FLOW REGULATING VALVE Filed June 28. 1927 2 Shgets-Sheet 2 w 19 m *9 W 1 7.55- /7 55 a I v INVENTOR.

Patented Dec. 7 6, 1927 UNITED STATES I I 1,651,507 PATENT OFFICE.

HJALMER rnnnnnrcx BLVOMQIUIQST AND GEORGE c. MILLER, or cnnaa RAPIDS, Iowa.

COMBINED PRESSURE-REDUCING AND GAS-FLOW-REGULATING VALVE.

Application filed .Tune 28, 1927. Serial is. 202,032.

This invention relates to a combinedxpressure reducing and gas flow regulating valve and more particularly to a valve of this character for handling chlorine and similar corrosive gases which are employed in the purification of water and other liquids;

An important object of the invention is to produce a control mechanism which will permit the pressure of the gas't-o' be very closely controlled between certain limits'and bv means of which the-regulation may be very readily effected.

'A further and more specific object of the invention is to provide a valve of this character'wherein a directly weighted valve controls the flow of the inlet of and is counterbalanced by an adjustable column of mercury, so that the pressure at which the gas wil-l'be permitted to pass the valve may be regulated.

A further object of the invention is the production of a combined back pressure and vacuumrelief valve for regulating the back pressure of the gas on thedischarge side of a gas measuring orifice, and to prevent the formation of a vacuum in the valve, thereby preventing the possibility of drawing water or other liquid back through the gas, discharge line if thegas supply should be exhausted or shut oflf. 1

A further object of the invention is the provision of a device for controlling the flow of chlorine at a predetermined rate from a shipping cylinder in which it is transported and stored under a high pressure to water for sterilization under .low pressure, em-V bodyingmeans to reduce the gas pressure at which it is confined in shipment and storage and to maintain a predetermined lower back pressure and regulating the flowof gas after the regulation ofthe pressure thereof.

These and other objects we 'a'ttainbythe construction shown in the accompanying drawings wherein for the purpose of illustration is shown a preferred embodiment. of

our invention, and wherein Figure "1 is a vertical sectional :view through a combined pressure reducing and gas regulating valve constructed in accord 'an'ce with our invention, the section being taken approximately on the line 1 1 of g .1 w

Fig; 2 is a hor-inontal section on the line '22 ofrFig. 1.

7 line i3+3of Fig. 1, j

Fig. 3 is a detail sectional view on the I I I which would cause fluctuations in gas pres:

of the U-tube hereinafter referred to.

Referring now more particularly to the drawings, the numeral 10 generally de'sig 'nates a cylindrical casing at the interior of which a transversely extending bridge 11 is provided. This bridge at its center and upon its upper surface is provided with a' valve seat 12, which is of glass, and upon which a glass check ball 13 seats. A port lalformed in the bridge communicates with the valve seat at its inner end and at'its outer end is adapted for connection withthe feed line through which the gas to be regulated is introduced; Within 'the casing is disposed'a weight 16 in the form of a saddle, the central portion ofwhich rests uponthe valve 13 and'the lower portions of the legs 17 of which extend below the lower surface of the bridge 1 1. -The lower ends of these legs rest upon a plate 18 which in turn rests upon a diaphragm 19, which bridges the concavity 20 formed in the upper surface ofthe bottom'wall 21 of the casing. The under surface of the bottom wall' is likewise concaved, as indicated at 22, and is bridged by a diaphragm'i23 held in position against the base plate bya false'bottom 24. The concavities 2O andv22 are incommuniin communication with the 1 atmosphere.

vThrough the false bottom, an adjusting screw 27 extends for engagement with the slower diaphragm 23 and it will be obvious that by adjusting the, screw, the height of the column within the tube, 26 may be regulated, since mercury'will' be driven from the concavities and forced into the tube.

Since the height of the mercurycolumn opposes'the diaphragm 19 and, therefore, ex-r erts its pressure throughrthis diaphragm and plate 18 against the combined efi'ect of the weight and the gas pressure in the cvlinder10, it will be obvious thatJthe adjusting screw provides a'meansfor adjustably regulating the effective weight of the saddle and accordingly the pressure at which the valve 13 maybe opened by the incoming gas,

and thus maintainany desired gas pressure in the cylinder 10. In order to prevent oscillation of the counterbalancing column,

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sure, a naalle ulve 2b is preferably arranged in the mercury tube 26 torestrict the How therein.

A second casing 528 is provided having arranged therein upon the bottom thereot a valve seat 28 of glass, which communicates with a discharge port 2!) through which the gas escapes to the point where it is to be employed. The valve 30 enacting; with this seat is carried by a flexible diaphragm 31., which bridges the concavity 3;, formed in the top wall 33 of the caning. (lommnnicating with the space between the diaphragm and the top wall is the lower end of a vertically extending irercurv tube ill, which serves to exert a sulistantiallv eoni'ttant pressure against the diaphragm, tenth ing to maintain the valve 2}) closed. The under surface of the. bottom wall 35 oi.

the casing is concave, as at tilt, and the die phragin 3T bridging this crmeavit v is held against the bottom wall bya 'lalse bottom wall 38. i l i The upper face of the ialse wall #38 is likewise ctmcaved. aaindicated at 3th and adjustable through this tube wall at the center thereof a plug .40. the upper ourface of which provided with a writ seat 41, which receives the end o! a ported glass valve &2 carried by the diaphragm to Slll the same and prevent communication between spaces at opposite sides oi the diaphragm. The false wall 38 has a port all minmunicating with one. ct these spaces and the other of the spaces is in eonunuuis cation with the interior of the casing 28 by a port 41:"). It will be obvious that upon the formation of a partial vai'aunn within the casing; 28, this vacuum will be tran mitted to the upper surface ol' the d: nbragruu can in the diaphragm to lleiiand the valve lzl to disengage from its scat admitting: air throu h the port 44, the port otithe valve l2 ant port a?) to the easin Applied to the side wall (it the cal it) is an outlet fitting 4:6 having an eahanvt port 47 which coaets with an exhaustport 48 formed in the wall The wall en oying-Eng! tare of the fitting lli is rabbeted about the port l7 to provide a seat for a glass measuring orifice 49 providing a hard i eniin lictween the exluuut port l-i and the interior of the easing l). The roniluih i inhaled at 50, connects the exhaust port 47 of the fitting ill with an intake port 51 of the aisingz The exhaust fitting 46 is likewise provided with a port .7123 eonuuunieating" with a port 54: 'fOI'lIlttl through the wall of the casing 10, and a branch port :35 couuminicating with the exhaust port 47. A U-tule oil has its ends in con'miunicati on with the ports and 55 and accordingly in cmnnninication with the gas ted tl'iroue'h the apparatus at opposite sidea of the orilire -ifl, Within this U-tube a suitable liquid is disposed and memo? the proper point. with relation to the liquid of the tube and the rate of flow per unit of each may be read upon this s :ale.

It will be obvious that in operatioi'i, as entering the casing 10 from the source is opposed in its entrance by the eon'il'iined ettertof the weight of the saddle lb and the gas pressure in the cylinder ll) minus the weight of the column of mercury in the tube 26 which is oppoii-ted thereto so that gar-i will only enter the lasing at a predetermined ln'essure. 'lhis passes through measurinnorifice all) and through the conduit 50 to the using 28 from which it may not escape i until the pressure within this easing build-i up sutlicientlv to overcome the weight of the l A i a mercury column in the tube i i-3 .lhus, the

gas pressure on both sides of the oriliee is regulated, and since the rate of flow of any gas through an orifice varies with the (hi terenee of the preaeure on the two sides of such orifice, it is obvious that any predeie mined rate of flow of gas through the device may be obtained, In event the gas becomesexhausted in operation and there a ten denev to formation of vacuum-1 in the casing; 98, which would draw the water or other liquid in which the gas is discharging into the apparatus, this vacuum will be b oken by movement of the diaphragm 37 which uni-"eats the port valve The e: and 10 will be secured to a supportin ard 58 by bolts 59.

lt will be obvious that a device ol this character will provide tor a very minute reilulation of the ilow oi' the g1". s and oil the sure at which the has is discharged. i i ill also be obvious that. the eouwtruction hereinbelore :et forth is capable of a certain range ol rhane" and nualilication wthonl ma- 'lcriallv departing: from the spirit of the iu-- veution and we a cordingly do not limit ourselves to such specilic structure except an hereinafter claimed,

l. in a regulating: like. a caz-iing having 51' staml valve for gas and the I an ii'itakiu a valve controlling: the intake. weight imposing openin of the valvuai'id sealed within the using, the casing having a movable wall from which said weight may be supported and a lluid column for urging; saiclmovable will to a position where it supports the combined etl'eet of the weight and the internal gas pressure in the casing. v

2. In a regulating valve forges and the like, a casing having an intake, a valve con trolling the intake, a weight opposing opening of the valve and sealed within the easing, the casing having a movable wall from which said weight may be supported, a

isingz's fluid column for urging said movable Wall to a position where it supports the combined efi'ect of the weight and the internal gas pressure in the casing and means for adjusting the static head of the fiuid column,

In a regulating valve for gas and the like, a casing having an intake, a valve controlling the intake, a weight opposing opening of the valve and sealed Within the casing, the casing having a movable wall from which said weight may be supported, afiuid columntor urging said movable Wall to a posit-ion where it supports the combined effect of the weight and the internal gas pressure in the casing, the column communicating with a chamber one wall of which comprises said movable wall, a second movable wall for the cham berand means foradjusting said second movable wall to force fluid from the cham-' her into the column to thereby regulate the height thereof.

4. In a regulating valve for gasand they like, a casing having an intake, a valve eontrolllng the lntake, a Weight opposing opening of the valve and sealed within the casing, the casing having a movable wall from which said weight may be supported, a fluid columnfor urging said movable wall to a position where it supports the combined ef fect of-the weight and the internal gas pressure in the casing, said chamber having an orificedr outlet and means for maintaining a constant back pressure against the outlet.

5. In a regulating valve for gas and the like, a casing having an intake, a valve con trolling the intake, a weight opposing opening of the valve and sealed within'the easing, the casing having a movable Wall from which said Weight may be supported, a fluid column for urging said movable wall to a position where it supports the combined effeet of the weight and the internal gas pressure in the casing, a second easing, a discharge line connecting the first and second casings, a valve cont-rolled outlet for said second casing, means resisting opening of the valve of the outlet of thesecond casing with a constant pressure and a measuring orifice contained in said discharge line. f

6. In a regulating valve for gas and the like, a casing having an intake, a valve eontrolling the lntake, a Weight opposing open,-

ing of the valve and sealed within the casing, the casing having a movable wall from which said weightv may be supported and a fluid column for urging said movable wall to a position where it supports the combined effect of the weight and the internal gas 7 pressure in the casing, said valve and its seat being of non-eorrodible material.

7. In a regulating valve for gas and the like, a casing having an intake, a valve controlling the intake, 21 weight opposing opening of the valve and sealed within thecasing, the casing having a movable wall from which said weight may be supported, a fluid column said discharge line, a U-tube communicating at one end with the discharge linebeyond the orifice from the firstnamed casing and at its opposite end from the interior of the first named casing and an indicating fluid within said tube. p

8. In a regulating valve for gas and the like, a casing having an intake, a valve eontrolling the intake, a weight opposing opening of the valve andsealed Within the easing, the casing having a movable wall from which said weight may be supported, a fluid column for urging said movable wall to a position Where it supports the combined effeet of the weight and the internal gas pressure in the casing, a second casing, a dis charge line connecting the first and second casings, a valve-controlled outlet for said second casing, means resisting opening of the valve of the outlet of the second casing with a constant pressure, a measuring orifice contained in said discharge line, said casing having a further outlet and a ported diaphragm valve controlling said outlet.

Intestimony whereof we hereunto afliX our signatures.

HJALMER FREDERICK BLOMQUIST. GEORGE C. IlllIlQLER. 

